> Money has no value without violence because it's only utility is to pay taxes so you do not go to jail

Before crypto took off I would have agreed, but your theory has to account for that glaring counterexample. No one violently enforced the value of bitcoin or monero or any of the other crypto and yet many of them are soaring in value.

As for the rest, yes, if you can convince a majority of the mechanism of violence within a state to abandon it then the state will collapse. At that point monetary collapse is just a detail though since they won't be able to enforce anything.